Sprocket.



P. L. GROWE & A. PRANKENHEIM.

SPROCKET. APPLICATION FILED MAE. 9, 1914.

WIT/M8858 momvz Patented Dec. 29, 1914.

UNITED STATES PATENT OFFICE.-

PAUL L. CROWE AND AARON-FRANKENHEI-M, OF NEW YORK, N. Y. .SPROCKET.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Continuation in part of application Serial No. 400,722, filed November 4, 1907. This application filed March 9, 1914. Serial No. 828,387.

To all whom it may concern:

Be it known that we, PAUL L. CRowE and AARON FRANKENHEIM, citizens of the United States, residing, respectively, in the borough of Manhattan, city, county, and State of New York, and the borough of Bronx, county of Bronx, and State of New York, have in vented certain new and useful Improvements in Sprockets, of which the following is a specification.

This invention relates to chaln grates wherein the grate bars are connected at their ends to cable chains having their links disposed alternately in vertical and horlzontal, or edgewise and flatwise relation; and its object is to provide a sprocket which will engage both the chain and the bars of such a grate and insure a good driving connection.

In the accompanying drawings illustrating the invention: Figure 1 is a side elevation illustrating in a somewhat conventional manner one end of a chain grate in which our invention may be embodied; F ig. 2 is a section on the line 22 of Fig. 3; Fig. 3 is a 5 cross-section through the shaft showing the sprocket in side elevation; Fig. 4 is a crosssection through the sprocket; and Fig. 5 is a side elevation thereof.

The grate comprises transverse grate-bars 1, connected at their ends to cable chains 2, of which only one is shown. These chains are disposed with alternate links in a vertical plane and the other links in planes perpendicular thereto. Theymay be referred to as the vertical and horizontal links, respectively, or as edgewise and flatwise links. The grate-bars may be varied in construction as desired. In general they comprise fuel-bearing portions 3 and web portions 4, the term web portions being used broadly to refer to the narrower structural portion of the bar below the fuel-bearing portion. Each link of the chain is connected to the end of a bar, the edgewise links being engaged by endwise projecting pins 5 and the flatwise links by pins 6 at right angles to the bar. For convenience these pins may be termed the horizontal and vertical pins respectively. The pins 5 are preferably head: less at their outer ends, and are fixed to or formed with the bars, while the pins 6 have heads and are removably attached to the bars, all-as more particularly disclosed in our copending application Serial N o. 5 823,388, filed March 9, 1914. The term pins is used for convenience, and it will be understood that I do not limit myself to the exact form of these attaching devices.

The sprocket 7 is mounted on a shaft 8, which may be the driving shaft and which preferably extends across to the other side of the grate, where, it will be understood, it bears another sprocket to engage the other cable chain.

The sprocket is formed with a circumferentially recessed portion 9, flanked by portions 10 and 11 of larger diameter. said portion 9 is formed with seats 12 and 13, shaped to fit the edgewise and flatwise links, respectively. The seats 12 for .the edgewise links are narrow and depressed below the seats of the flatwise links, and are straight at the bottom and in angular relation to each other, as shown. The porseries of the web portions of part or all of the bars. Preferably, however, they are provided only for the bars having the pins 5 engaging the edgewise links, the extremities of the web portions of adjacent bars being cut away so as to accommodate the said portion 10 without recessing the latter. The portion 11 of the sprocket is formed with a plurality of radiating arms 15, which are disposed opposite the edgewise link seats 12 and the bar recesses 14, the latter entering the sides of the edgewise link seats." The heads of the vertical pins 6 are accommodated in recesses 16 formed within and below the seats 13 of the flatwise links. The inner faces'j of these arms 15 afi'ord lateral support to the edge- The wise links and constitute abutments against which the ends of the pins 5 may bear.

From the foregoing it will be apparent that the sprocket afl'ords firm support to the chain and bars when the latter are making the turn at the end of the run of the grate, and insure a reliable driving engagement with the bars as well as with the chains.

he subject-matter of this case was in substance disclosed in our prior application, Serial No. 400,722, filed November 4, 1907, but is not therein claimed, such claims being reserved for this application with benefit of the filing date of the earlier case.

What we claim as new is:

1. In a chain grate, the combination with a cable chain having alternate links disposed edgewise in a vertical plane and the other links being disposed fiatwise in planes at right angles thereto, and grate-bars connected at one end to said links and comprising fuel-bearing portions and web portions, of a sprocket having a circumferentially recessed portion flanked by portions of larger diameter, said recessed portion being formed with seats fitting the edgewise and flatwise links of the chain respectively, the seats for the edgewise links being narrow and depressed below the seats for the flatwise links and being straight and in angular relation to each other, and the lnner of said portions of larger diameter being formed with recesses adapted to receive web portions of the gratebars as the grate travels, said recesses entering the sides of the seats of theedgewise links.

2. The combination with a cable chain and bars connected at one end thereto, of a sprocket having a circumferentially recessed portion flanked by portions of larger diameter, said recessed portion being formed with seats fitting the edgewise and flatwise links of the chain respectively, the inner of said portions of larger diameter being formed with recesses adapted to receive end portions of said bars, and the outer of said portions of larger diameter being formed with a plurality of radiating arms, said arms being op-' posite said bar-receiving recesses.

3. The combinationwith an endless traveling structure comprising a cable chain having alternate links disposed edgewise in a vertical plane and the other links being disposed fiatwise in planes at right angles thereto, transverse bars, devices projecting endwise from alternate bars and engaging the edgewise set'of links, and devices projecting at right angles from the other bars and engaging the flatwise set of links, ofa

sprocket having a seat-bearing portion formed with'seats fitting the two sets of links respectively, radiating arms at the outer side of said seat-bearing portion and opposite the seats for the edgewise link s,-,

and recesses in the portion of the sprocket at the inner side of said seat-bearing portion adapted to receive the bars.

In witness whereof we have signed our names in the presence of two subscribing witnesses.

PAUL L. CROWE. v AARON FRANKENHEIM.

Witnesses J. F. BRANDENBURG', E. GREENBERGER. 

